Radio Early History Essays - Photovoltaics,

Radio: Early History Presentation Dialogue SOLAR ENERGY. All life on Earth depends on energy from the sun. Solar energy is the source of energy for photosynthesis. It provides the warmth necessary for plants and animals to survive. The heat from the sun causes water on the Earth's surface to evaporate and form clouds that eventually provide fresh rainwater. Solar energy is the result of thermonuclear fusion reactions deep within the sun. These reactions produce so much energy that they keep the surface temperature of the sun at about 10,300B0F (5,700B0C). Even though solar energy is the largest source of energy received by the Earth, its intensity at the Earth's surface is actually very low due to the large distance betwee n the Earth and the sun and the fact that the Earth's atmosphere absorbs and scatters some of the radiation. Even on a clear day with the sun directly overhead, the energy that reaches the Earth's surface is reduced about 30 percent by the atmosphere. When the sun is near the horizon and the sky is overcast, the solar energy at ground level can be negligible. It also varies from one point to another on the Earth's surface. Nevertheless, in the 20th century, the sun's energy has become an increasingly attractive source for small amounts of direct power to meet human needs. A number of devices for collecting solar energy and converting it into electricity have been developed, and solar energy is used in a variety of ways. Solar energy is used to heat houses, and in many countries specially designed solar ovens are used for cooking. The sun also supplies energy to electric generators that provide power for weather and communications satellites and for radio and television equipment. Because the intensity of the sun's radiation at the surface of the Earth is so low, collectors designed to capture solar energy must be large. In the sunniest parts of the continental United States, for example, in orde r for a collector to gather enough energy to serve one person for one day, the area of the collector's surface must be about 430 square feet (40 square meters). The actual energy that can be used depends on the efficiency of the collector and of the device that converts the radiation into usable energy. Flat-plate collectors. The most common flat-plate collectors consist of a dark metal plate, covered with one or two sheets of glass, that absorbs heat. The heat is transferred to air or water, called carrier fluids, that flows past the back of the plate. This heat may be used directly or it may b e transferred to another medium. Flat-plate collectors are used for home and hot-water heating . Flat-plate collectors typically heat carrier fluids to temperatures ranging from 150B0 to 200B0F (66B0 to 93B0C). The efficienc y of such collectors varies from 20 to 80 percent. Concentrating collectors. When higher temperatures are required, a concentrating collector is used. These collectors reflect and concentrate sunlight from a wide area. One such device, called a solar furnace, was installed in the Pyrenees in France and has several acres of mirrors focused on a single target. The energy concentrated at the target is 3,000 times tha t received by any single mirror, and the unit produces temperatures of up to 3,630B0F (2,000B0C). Another structure, the so-called "power tower" plant near Barstow, Calif., generates 10,000 kilowatts of electricity. Here, the furnac e acts as a boiler and generates steam for a steam turbine-electric generator power plant. In sophisticated concentrating collectors such as the California tower, each mirror is rotated by a heliostat that directs the sun's rays fro m the mirror to the target. Positioning motors, drives, and controllers make such systems expensive. Less costly collectors can produce temperatures lowe r than those of more advanced concentrating collectors but higher than those o f flat-plate collectors. For example, parabolic reflectors that concentrate sunlight on black pipes can produce fluid temperatures of about 400B0 to 55 0B0F (200B0 to 290B0C) and can concentrate the solar energy up to 50 times its original strength. Small Stand-Alone DC System The small stand-alone system is an excellent replacement for propane or kerosene lights in a remote cabin, a recreational vehicle or a boat. The size of the photovoltaic (PV) array and battery will depend upon individual requirements. The actual sizing methods are discussed elsewhere. The PV arra y charges the battery during daylight hours and the battery supplies power to the loads as needed. The charge regulator terminates the charging when the battery reaches full charge. The load center may contain meters to monitor system operation and fuses to protect wiring in

Names of Occupations and Job Titles in Spanish

Names of Occupations and Job Titles in Spanish Chances are that when you start talking with native Spanish speakers, one of the first things youll talk about is your jobs or occupations- or what you hope to do someday. Heres a guide to talking about occupations in Spanish along with a list of the most common types of jobs. List of Occupational Names Many of the job titles below seem familiar, as many are English cognates, having come from Latin. Keep in mind, though, that in a few cases the meanings in similar-sounding titles dont always line up exactly, sometimes because of cultural differences. A secondary-school teacher in Latin America, for example, might be known as a profesor, while in the United States, at least, the word professor is used primarily at the university level. In this list, the masculine forms are given. The feminine forms are given following a slash (/) in cases where they dont follow the rules above. Note also that different words may be used in some areas, or for certain specialties. Accountant- contador, contableActor/actress- actor/actrizAdministrator- administradorAmbassador- embajadorArchaeologist- arqueà ³logoArchitect- arquitectoArtist- artistaAthlete- atleta, deportistaAttorney- abogadoBaker- panaderoBarber- barberoBartender- mesero, cantineroBeautician- esteticistaBiologist- bià ³logoBusinessman/businesswoman- hombre/mujer de negocios, empresarioButcher- carniceroCaptain- capitnCarpenter- carpinteroChemist (pharmacist)- armacà ©uticoChemist (scientist)- quà ­micoChief executive officer- director generalClerk (office worker)- oficinistaClerk (retail worker)- dependienteCoach- ntrenadorComputer programmer- programadorCook- cocineroDancer- bailarà ­n/bailarinaDentist- dentistaDoctor, physician- mà ©dicoDriver- conductorEditor- redactorElectrician- electricistaEngineer- ingenieroFarmer- agricultor, granjeroFirefighter- bomberoFlorist- floristaGeologist- geà ³logoGuard- guardiaHotelier, innkeeper- hoteleroJeweler- joyeroJournalist- cronistaKing/que en- rey/reinaLandlord- dueà ±oLawyer- abogadoLibrarian- bibliotecarioMail carrier- carteroMechanic- mecnicoMidwife- comadronaMinister (politics)- ministroMinister (church)- pastorModel- modelo (no separate feminine form)Musician- mà ºsicoNurse- nfermeroOptometrist- optà ³metraPainter- pintorPharmacist- farmacà ©uticoPilot- piloto (separate feminine form rarely used)Poet- poetaPresident- presidente/presidentaProfessor- profesor, catedrticoPsychologist- sicolà ³gicoRabbi- rabinoSailor- marineroSalesman/saleswoman- dependiente, vendedorScientist- cientà ­ficoSecretary- secretarioServant- criadoSocial worker- asistente socialSoldier- soldadoStudent- estudianteSurgeon- cirujanoTeacher- maestro, profesorTherapist- terapeutaVeterinary- veterinarioWaiter- camarero, meseroWelder- soldadorWriter- escritor Grammar of Occupations Gender One matter of some confusion can be the gender of the occupational names. In many cases, the same word is used to refer to a man as to a woman. For example, a male dentist is el dentista, while a female dentist is la dentista. In some cases, there are distinct forms, such as el carpintero for a male carpenter and la carpintera for a female carpenter. In many cases, both forms can be used to refer to a female. For example, the boss is el jefe if hes male, but either la jefe or la jefa if shes female, depending on the region and, sometimes, whos speaking. Similarly, la mà ©dica is used to refer to a female doctor in some areas, but in other areas la mà ©dico is used and/or might be considered more respectful. In nearly all cases, using la with the masculine form is the safer choice if youre not sure of local usage. Otherwise, the feminine form of the occupations ending in -o are formed by changing the -o to an -a. Occupations that end in -dor are changed to -dora for the feminine. Occupation names that already end in -a are the same in masculine or feminine. Use of the Indefinite Article Unlike English, Spanish does not use the indefinite article- a or an in English, and un or una in Spanish- when specifying someones occupation: No soy marinero; soy capitn. (I am not a sailor; I am a captain.)Mi madre es profesor de ciencia. (My mother is a science teacher.)Felipe Calderà ³n era presidente de Mà ©xico. (Felipe Calderà ³n was president of Mexico.)Se hizo actriz extraodrinaria. (She became an extraordinary actress.) However, the article can be used in other situations, such as when talking about an occupation in general: Un actor es una persona que interpreta un papel. (An actor is a person who plays a role.)El juez condenà ³ a un dentista por hacer extracciones innecesarias. (The judge sentenced a dentist for performing unnecessary extractions.) ¿De dà ³nde saca la inspiracià ³n un escritor? (Where does a writer get inspiration from?) Some occupation names can be used in ways characterize actions rather than referring to occupation, in which case the article can be used. Todos sabà ­an que el despota era un carcinero psicoptico. (Everyone knew the dictator was a psychopathic butcher).Mi moto es un psicolà ³gico, y la velocidad mi terapia. (My motorcycle is a psychologist, and speed my therapy.) Key Takeaways Many occupations names in Spanish are similar to those of English because they both come from Latin.The indefinite article (un or una) is not typically used when referring to someones occupation.Separate feminine and masculine forms exist for the names of some occupations, although their use varies across regions.

Muslims who assimilate are better off than those who maintain their Essay

Muslims who assimilate are better off than those who maintain their traditions and culture - Essay Example The general belief among Islamic scholars is that "all men are not created equal, and democracy eventually lets the fortunate over-run the less fortunate. The idea of a caliphate is only now beginning to take hold in the Arab world. Europe won't come around until our example is there to follow "(Chu). Democracy in its present form is unacceptable to Islam. Islamic world believe that the efforts of Europeans to spread democracy across Arab world is an attempt to destroy Islamic culture and traditions. The agitations happening at present in Libya, Yemen, Syria, Bahrain, Oman, etc like Arab countries are perceived as the deliberate attempt by the Western World to topple Islamic administrations prevailing in those countries. It should be noted that these agitations were originated not because of the interferences of any other Western country, but because of the self-realization of people about their present pathetic conditions compared that in other countries. In fact the recent successf ul revolution in Egypt and the marginalization of people by the patriarchal administrations motivated the people in other Arab countries to fight against the fundamental Islamic administrations. â€Å"In the social realm, Shari'a is more restrictive than Western norms and lifestyles.

How do we end gridlock in the American political System and modernize Term Paper

How do we end gridlock in the American political System and modernize the federal Government's administrative infrastructure t - Term Paper Example â€Å"Gridlock† as it is experienced in Washington D.C. today represents a system of government that the Anti-Federalists specifically warned against in the founding of the United States through the Constitutional Convention, â€Å"Bill of Rights† negotiation, and state ratification process. In understanding how Jeffersonian ideals relate to â€Å"Athenian† democracy, and also how populism and progressivism present a historical framework for reform of the political system, the goal is to continue in the tradition of innovation in social institutions so as to make them more open, transparent, participatory, and non-violent as a basis of civil society. This essay discusses downsizing government, decentralizing political organizations, and building stakeholder frameworks that lead to real participation in government organizations and decisions by citizens. The essay also discusses possibilities to increase multi-party political representation through use of informat ion technology and other forms of innovation in democratic organization to implement fundamental ideals through progress. Table of Contents Abstract 1 Table of Contents 1 I. Introduction 2 II. Definition of â€Å"Gridlock† 4 III. Two Party Monopoly 6 One example commonly cited as â€Å"gridlock† is the prevention of legislation from passing by one party through control of one branch of government, such as a Republican party majority in the Senate refusing to support Democratic legislation, or a Republican president unable to build legislative support for his/her agenda in the House of Representatives. A larger aspect of â€Å"gridlock† is the actual two-party monopoly that prohibits a wider representation of views and discussion of issues in the Federal system. This can be compared to systems of government internationally that encourage wider multi-party frameworks and coalitions, as well as an ideal of direct, participatory democracy that would be supported thr ough a more diverse representation of views than found in two-party politics. While the Constitution does not mandate a two-party system, â€Å"winner take all† representation does discourage third party candidates from attaining office, as do the discriminatory ballot measures that restrict ballot access to third parties. 6 IV. Corporate Interests over Public 6 One of the most important issues related to the ideological fusion of Capitalism and Democracy in Enlightenment thought is corruption in government related to minority business interests and the use of â€Å"pork-barrel† politics and legislation to produce social injustice. The recent Wall St. bailouts are an excellent example of the valuation of the interests of the â€Å"super rich† over the â€Å"super poor†. Nevertheless, innumerable aspects of the interrelationship between the U.S. government and the economy can be found. The chart below estimates the Federal Government to be related to appro ximately 43% of U.S. GDP through taxation, spending, and social programs. It is interesting to note that before the 20th Century government spending was typically representative of less than 10% of GDP, representing another aspect of the anti-federalist view. 6 US Government Spending as Percent Of GDP Source:

Importance of Management Essay Example for Free

Importance of Management Essay Management  is a universal phenomenon. It is a very popular and widely used term. All organizations business, political, cultural or social are involved in management because it is the management which helps and directs the various efforts towards a definite purpose. According to  Harold Koontz, â€Å"Management is an art of getting things done through and with the people in formally organized groups. It is an art of creating an environment in which people can perform and individuals and can co-operate towards attainment of group goals†. According to  F. W. Taylor, â€Å"Management is an art of knowing what to do, when to do and see that it is done in the best and cheapest way†. Management is a purposive activity. It is something that directs group efforts towards the attainment of certain pre determined goals. It is the process of working with and through others to effectively achieve the goals of the organization, by efficiently using limited resources in the changing world. Of course, these goals may vary from one enterprise to another. E. g. : For one enterprise it may be launching of new products by conducting market surveys and for other it may be profit maximization by minimizing cost. Management involves creating an internal environment: It is the management which puts into use the various factors of production. Therefore, it is the responsibility of management to create such conditions which are conducive to maximum efforts so that people are able to perform their task efficiently and effectively. It includes ensuring availability of raw materials, determination of wages and salaries, formulation of rules amp; regulations etc. Therefore, we can say that good management includes both being effective and efficient. Being effective means doing the appropriate task i. , fitting the square pegs in square holes and round pegs in round holes. Being efficient means doing the task correctly, at least possible cost with minimum wastage of resources. Management can be defined in detail in following categories : Management as a  Process Management as an  Activity Management as a  Discipline Management as a  Group Management as a  Science Management as an  Art Management as a  Profession 1. It helps in Achieving Group Goals   It arranges the factors of production, assembles and organizes the resources, integrates the resources in effective manner to achieve goals. It directs group efforts towards achievement of pre-determined goals. By defining objective of organization clearly there would be no wastage of time, money and effort. Management converts disorganized resources of men, machines, money etc. into useful enterprise. These resources are coordinated, directed and controlled in such a manner that enterprise work towards attainment of goals. 2. Optimum Utilization of Resources   Management utilizes all the physical amp; human resources productively. This leads to efficacy in management. Management provides maximum utilization of scarce resources by selecting its best possible alternate use in industry from out of various uses. It makes use of experts, professional and these services leads to use of their skills, knowledge, and proper utilization and avoids wastage. If employees and machines are producing its maximum there is no under employment of any resources. 3. Reduces Costs   It gets maximum results through minimum input by proper planning and by using minimum input amp; getting maximum output. Management uses physical, human and financial resources in such a manner which results in best combination. This helps in cost reduction. 4. Establishes Sound Organization   No overlapping of efforts (smooth and coordinated functions). To establish sound organizational structure is one of the objective of management which is in tune with objective of organization and for fulfillment of this, it establishes effective authority amp; responsibility relationship i. e. who is accountable to whom, who can give instructions to whom, who are superiors amp; who are subordinates. Management fills up various positions with right persons, having right skills, training and qualification. All jobs should be cleared to everyone. 5. Establishes Equilibrium   It enables the organization to survive in changing environment. It keeps in touch with the changing environment. With the change is external environment, the initial co-ordination of organization must be changed. So it adapts organization to changing demand of market / changing needs of societies. It is responsible for growth and survival of organization. 6. Essentials for Prosperity of Society   Efficient management leads to better economical production which helps in turn to increase the welfare of people. Good management makes a difficult task easier by avoiding wastage of scarce resource. It improves standard of living. It increases the profit which is beneficial to business and society will get maximum output at minimum cost by creating employment opportunities which generate income in hands. Organization comes with new products and researches beneficial for society. What is the Importance of Management in Business? â€Å"Some underestimate the importance of management in business but the latest researches have shown that it is certainly not the case. The input of the labor, capital and raw materials can never become production without the catalyst of management. A business cannot survive without management because management is its means of support. Management is concerned with acquiring maximum prosperity with minimum efforts. Management is essential wherever group efforts are required to be directed towards achievements of common goals. In this management conscious age, the significance of management can hardly be over emphasized. It is said that any thing minus management amounts to nothing. There is no more important area of human activity than management since its task is that of getting things done through others. Some underestimate the importance of management in business but the latest researches have shown that it is certainly not the case. The input of the labor, capital and raw materials can never become production without the catalyst of management. Management is a dynamic life-giving element in an organization. In its absence, the resources of production remain underutilized and can never become production. In fact, without efficient management, no country can become a nation. Business is basically a group activity and management plays an important role in making it more effective. The group as a whole cannot realize its objectives unless and until there is mutual cooperation and coordination among the members of the groups. Management creates teamwork and team spirit in an organization by developing a sound organizational structure. It brings the human and material resources together and motivates the people for the achievement of goals. The available resources of production are put to use in such a way that all sort of wastages and inefficiencies are reduced to a minimum. If the managers in any business are not considerate and good at their job, nothing worthwhile can be expected of the subordinates. The motivation level of the employees is directly related to good management. Management creates and maintains an environment conducive to higher efficiency and performance. A business enterprise operates in a constantly changing environment. Changes in the business environment create risk and also provide opportunities for growth. A conducive and encouraging environment is indispensable for any business and sound management makes it possible easily. Negative Aspects of Technology Introduction The history of technology is as old as human life. This is because the usage of technology came into existence when the humans existed. Technology had a great progress since ages that is from mastery of fire by man to computers, rockets, electronics etc which shows the 21st century achievements. The technologies that evolved in the past and even now made our lives comfortable. People are totally dependent on technology. Technology helps in speedy development and changes. According to a dictionary the definition of technology is given as â€Å"the sum of the ways in which social groups provide themselves with the material objects of their civilization. (Technology, 2012). This shows that technology usage has become as part of our life. These technologies include computers, cell phones, emails, video conferencing and even the basic things like microwave oven and fridge. Technology has become important in every aspect of our life. It changed our way of life in both positive and negative ways. Over past decade, there are many new techno logies that have evolved and there is much advancement in the existing technologies. Technology separates individuals from reality. Problem The advancements in technologies have made our lives comfortable but there is a great negative impact of the technology in our lives. There are many factors that supports that technology has adverse effects on society. Technology is not always green. While new and rapidly advancing knowledge will surely become a dominant force shaping the future of mankind, experts tells that advancing technology always brings side effects. This is because humans modify nature to meet their needs and wants. So scientists feel that the development of technology is causing harm to the environment. Technologys Negative Impact on Business Technology has positive affects on global business. The Internet makes it possible for people to communicate easily with associates in other countries. Ecommerce makes it possible for consumers to purchase almost anything from almost anywhere. And the flow of information is fast and often free once you have paid for Internet access. However, technology also has negative impacts on business. Business Relationships Internet technology such as chat rooms, Skype and other software has made it possible to hold meetings without all parties being physically present in the same place. A drawback is that meeting with somebody over the Internet is much less personal than meeting face-to-face. Internet technology in business decreases the personal aspect of business relationships. Business people used to network in restaurants and on golf courses. Today, the lack of physical proximity decreases brainstorming and other communications that use a personal touch. Employee Morale Installing monitoring software in the workplace sends the message to employees that the company does not trust them, according to research done under the aegis of professor Howard Besser while teaching at New York University. Giving employees responsibility, trust and respect boosts their morale and productivity. Showing them that they are not trusted and must be recorded decreases morale and worker productivity. This is true regardless of the actual reasons for installing monitoring software, according to the same research. Spam Spam refers to unwanted and unsolicited email messages. Spam is widespread and has negative impacts on business, according to the article Impact of Information Technology on Global Business published by Purdue University. Wading through spam email is a waste of time, and spam filters can only do so much. Users of spam filters must then check for necessary email messages diverted incorrectly as spam. Brick and Mortar The popularity of ecommerce has had a negative impact on brick-and-mortar retail stores. Smaller stores are finding more and more difficult to compete with both Internet businesses and larger retail stores. For example, small community bookstores must compete with Amazon. com as well as large stores such as Barnes ;amp; Noble that sell in person and online. Sometimes the smaller stores end up going out of business.

Shakespeare’s Comedy of Errors Essay -- essays research papers

Shakespeare’s Comedy of Errors Comedy of Errors is one of Shakespeare’s first plays. The minor characters, in the play, Egeon and the Duke, set up the framework of the play. Egeon, at the request of the Duke, describes his adventures and relates his life story. This provides the history of The Comedy of Errors, and helps keep track of the confusion, which unfolds during the play. There are several themes that Shakespeare uses which are only loosely related to the actual comedy. The conflicts between burden and freedom, rule and compassion, loss and rebirth all form a critical undertone within the play. There is also the serious effect time. Shakespeare requires that all the action end at five o'clock, the time of Egeon's execution, Antipholus of Syracuse's meeting with the merchant, and the moment when Angelo must pay the Second Merchant his money. There are also several coercions within the play. The comedy opens with Egeon unintentionally breaking the law, for which he is sentenced to death. In addition to this very real danger of death, there is also the risk that the play will end too soon. At various times the reader could assume the characters are close to revealing the entire plot and ending the play. These occur when Antipholus has the chance to demand payment from his father at the beginning, and also when both Dromios are on opposite sides of the door at Adriana's house. The characters are meant to gain knowledge of something. For instance, the Duke claims th...

Directed Writing Essay

Judging from the letter you sent me last week, you seemto be doing just fine. I would like to apologize for not writing sooner; the ton ofholiday homework I received from school made it virtually impossible for me topen a reply any sooner than today.My answer to your question would definitely be a yes. I think that youwould make an excellent Head Prefect. Your out-going and down-to-earthpersonality should be enough to convince you of your undoubted capability totake on this task. Your friendly  and helpful  nature would make it easy foryou to get along with the students and reprimand them in a tactful way. I am also sure that you would take your responsibilities seriously as you are one ofthe most responsible people with whom I have made my acquaintance.Furthermore, your academic performance outshines your peers makingit clear that you are an intelligent and hardworking student. This in itselfproves that you are capable of dealing with heavy workloads. Goodnessknows, with the subject combination that you are taking, your workload isanything but light. Plus, I know that you especially have a knack for solvingproblems. Though being a Head Prefect is without doubt a tiring job, theexperience you have gained from being actively involved in co-curricularactivities should help you to pull through. Being the Captain of the BlueHouse  should give you a vague idea of what it is like to lead the school, while as the secretary of the English Language Society  , you should be an expertat handling paperwork and organizing events. Besides  that, by virtue of youbeing a school debater  , your speeches would surely be outstanding.The strategic  location of your house  should also give an extra shovetowards running for the past. As it is within walking distance from theschool, you would be able to sacrifice time and effort in carrying out yourduties as Head Prefect. Your academic performance would also beunaffected as you are a consistent student with good study habits. Inaddition to that, you have a further advantage of being popular among thestudents as well as the teachers  .Having read of all your good qualities should make it an easy choice foryou now, don’t you think? I hope I have helped you to make up your mind, butremember that no matter what choice you make, I will be rooting for you. Letme know of your decision. Till next time, bye!Your friend,Hisha